A Review on Study of Heat Transfer Rate on Multipass Submerged Arc Welding

In arc welding the heat flow from the tip of electrode to the base metal. The heat transfer rate is generally based on the work material, weld material, welding process, inert gases etc. The heat transfer rate and rate of cooling in welding can directly controls microstructure and mechanical properties of welded region and base metal. The proposed study going to carry out on multipass submerged arc welding for varying heat input. The one dimensional, two dimensional and three dimensional heat flow equation will be used for the total heat transfer rate in submerged arc welding. The corresponding mechanical properties hardness c-v-n test results tensile strength of welded joint will be studied. This process is use full in joining thick section of components used in various industries. Besides joining SAW can also be used for surface applications. Heat affected zone produced in within the base metal as a result of tremendous heat of arc is of big concern as it affects the performance of welded surfaced structure in service due to metallurgical changes in the affected region. The various changes in the metal can be analyzed by heat transfer rate. The various sub zones in the microstructure were observed in HAZ of SAE weld of partially transformed. The main purpose of proposed work is to investigate and correlate the study of heat transfer rate on multipass submerged arc welding.